package pers.kui.mall.exception;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import pers.kui.mall.common.ApiRestResponse;

import java.util.ArrayList;
import java.util.List;

/**
 * @author: ldk
 * 描述: 处理统一异常的Handler
 */
@ControllerAdvice
public class GlobalExceptionHandler {
    private final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object handleException(Exception e) {
        log.error("Default Exception",e);
        return ApiRestResponse.error(ExceptionEnum.SYSTEM_ERROR);
    }

    @ExceptionHandler(MallException.class)
    @ResponseBody
    public Object handleException(MallException e) {
        log.error("MallException Exception",e);
        return ApiRestResponse.error(e.getCode(),e.getMessage());
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public ApiRestResponse handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
        log.error("MethodArgumentNotValidException",e);
        return handleBindingResult(e.getBindingResult());
    }

    private ApiRestResponse<Object> handleBindingResult(BindingResult result) {
        //把异常处理为对外暴露的提示
        List<String> list = new ArrayList<>();
        if (result.hasErrors()){
            List<ObjectError> allErrors = result.getAllErrors();
            // for (int i = 0; i < allErrors.size(); i++) {
            //     ObjectError objectError =  allErrors.get(i);
            //     String message = objectError.getDefaultMessage();
            //     list.add(message);
            // }
            for (ObjectError objectError : allErrors) {
                String message = objectError.getDefaultMessage();
                list.add(message);
            }
        }
        if (list.size() == 0) {
            return ApiRestResponse.error(ExceptionEnum.REQUEST_PARAM_ERROR);
        }
        return ApiRestResponse.error(ExceptionEnum.REQUEST_PARAM_ERROR.getCode(), list.toString());

    }

}
